Cement.



at Akasaka, in the city UNITED STATES PATENT orrrea.

- TADASHI MONIWA, F AKASAKA, TOKYO, JAPAN.

CEMENT.

1,233,101. Ro Drawing;

To all whom it may concern;

Beit known that I, Tannsm MONIWA, a subject of the 'Emperor of Japan,residing of Tokyo, in the Empire of Japan, have invented certain new anduseful Improvements in Cement, of

I whichthe following is a specification.

"stances or faces important rule has hitherto been overlooked;

" This invention relates to a new or improved cement..

Although numerous ]0l1'l1!1g cements are already known, their uses arein most cases limited, or they are only mechanically attached, or aresimply held in position by pressure, or, though they may adhere well fora length of time, they gradually lose their cohesive power under l'ongexposure.

to light and heat. To. maintain permanent cohesion it requires that thecoefiicient of expansion of the cement shall be equal to orapproximately equal to that of the subto be cemented, but this Ordinarycement used for joining brick or stone has almostthe'same. coeilicientof ex pansion as materials to he joined, and in this respect mustheregarded as quite effective. At the same. the great drawbacks in thatit requires moisture in its chemical hardening. and can only be usedwith suhstanees having absorbent faces. or else requires sullicienllyrough faces to effect mechanical attachment. Such substances ormaterials, thcrefore,' glass, enameled \var-csretc. the. coellicicnt ofexpansion of which differs considerahly from that of ordinary cement.and which, moreover, are of a non ahsorhent nature. and have smoothsurfaces, can never he satisfactorily joined with ordinary cement. Forthis reason ornamental onglazed hricks are. usually provided wilhhollows and notches or hooks to client mechanical attachment of thecement. Many kiudsofornamental or glazed bricks made of porcelain andearthenware are glazed only on the outside. faces, the. other facesheing left rough and ahsorhent.

. and when they are joined with ordinary eement the. latter soaksthrough or penetrates the ahsorhent hody of the brick and stains theglazed fare and produces a very 11-- sightly appoaran e.

'lheohjcct of this cement in) mean of which such substancesture andwhich are generally recognized as will and without, in

time, however, it has in\ out ion is to provide a Specification ofLetters Patent. Patented July 10, 191'? Applieltion filed Kay 22, 1916.semi No. 99,229. g

cohesion byknown cementing agentsbesuch 6o as ordinary cement, mortar,etc, can mented together or to faces of ordinary cement, mortar orlaster work, wood, stone,

brick etc, in sue a manner that cohesion case of absorbent substances,any staining thereof.

The invention COIlSI ts, essentially, in the utilization of asphalt as acementing agent;

be practically perfect. and permanent 05 t e Asphalt (of Japanese)production usu- 1o,

allyconsists of about 48% of mineral mat:

'tersand about 52% of-princi all elements.

The principal elements usual y consistof about 17 parts of asphalteneand about 35 parts of .petrolene. carbon bisulfid and kerosene, butasphaltene is quite insoluble in kerosene, hence the uantities'of thesetwo elements in any particular sample of asphalt can be readilycalculated. The mineral matters referred to generally exist in the formof pulverized minerals and have, when at a high tempera-- ture, theproperty ofsomewhat retarding the melting of the petrolene andasphaltene. Bv utilizing this characteristic property and addingquantities of non-melting mineral matter or matters, such as powderedquartz, asbestos, etc, inv such a; measure as to retard the melting ofthe superfluous petrolene, thecoetlicicnt of expansion of the mixturemay etrolene is soluble in be made the same or practically the same asthat of the substance .to be cemented. By this means a cement having thesamefor practical] y the same degree, of hardness and coefiicient ofexpansion as the substance to be cemented can he prepared and the substance and cement will, t hcrefore, separate. only under the applicationof destructive force.

By numerous experiments it has been ascertained that a cementparticularly suitable;

for cementing wood, glass, enameled porcelain, earthenware and the liketo, for example, the surface of wood, may be com- The melting point (ifsuch a cement is about 428 -410 I: (PAP-210 A cement of the proportionsgiven will have a degree. of hardness and coeilieient of. expansionpractically equal 'to those of the siu faces ,to hennitecl and cohesionwill obtain at te'mporatures considerably above. those at'which cohesionb means-of ordinary known cements would not be, possible.

The improved cement is free. from the objections inherent to ordinarycements as it does not-require moisture in its chemical hardening andby: varying the proportion of the. non-melting mineral matters itseoefficient ofexpansion may be varied through a;comparatively widevrange 1' to accord or practically aecord -\\'ll'll that oi the. sub-4 staiuze. or substances withwhieh it is used.

Theoement. may he. used-by ll(]ll(l \lllf it .and lihen applying it-i'othe'l'aees 450 be nmtod. (")l' lt, may be. used In an zndu'eel.

manner by first applying it (o the faces to bounited. and, after settingof the eem'eni. thou oining the laces by ordinary eemenl or cementmortar. .ln either 'ase however.

whon tliefaces-aro united the. joining is of they will only separateunder lheqapplieav lion of destruelive. 'l'oree.

5 'lhe'improred cementum be used for seouring glazed or enameled brieksor tiles-1o ,,ordin'ar\ lnrieks oi; tiles bylirsi zll ll -ring it nobrupks or tiles and alter SOUllrlf pulling lo ilie ,lnu'hs of [he glazedor enameled them by (u'dinaur cement morlar lo (he or- ()wing toiho-[wrl'eel eohesion ol' the improved eenienl'. when used wilh smooth,

- -'lazed.- enameled and like faves; i(' is espe- ,eially suitablefol-fixing glazed. enameled. glass alul like bricks. ides or plates lllhospilals. inieriors generally. and in all eases where absoluteeleanlinessis of the imo. lmporl'anee as dean be used wdhoul an) cement.plaster work or the llke'of an ab sorhenl'-eha"ai'ter; without.staining, and

w itholuxauy danger of sheltering germs.

-.l elaun-- eelneulyeonsisliHg of hetrolene from 2o [0'25 parts.asphallene, [-1 (in l T parts. and

a uonmellinr mineralsubsla u-e l'rou 'llo to 55 parts;

ln leslimom whereof lhare allixed lll

